(a)[2]
Silicon is obtained by reducing silicon dioxide with carbon. $\text{SiO}_2 + 2\text{C} \rightarrow \text{Si} + 2\text{CO}$. What is the greatest mass of silicon that can be produced from $300\,\text{g}$ of silicon dioxide?
(b)[2]
Silicon has a giant molecular structure. Suggest any two physical properties of silicon.
(c(i))[1]
Draw the dot-and-cross diagram for silane, $\text{SiH}_4$. Show only the outer shell electrons of silicon.
(c(ii))[2]
Using ideas about structure and bonding, suggest why silane has a low boiling point.
(d(i))[2]
What is meant by condensation polymerisation?
(d(ii))[1]
Draw the repeat unit for this siloxane.
(e)[1]
Butene undergoes addition polymerisation to make poly(butene). Draw part of the structure of poly(butene). You must include at least two repeat units.